A man was shot in the arm shortly after midnight on Tuesday morning in North Baltimore, between the city's Guilford and Waverly neighborhoods, according to police.

Officers were dispatched to the 3700 block of Greenmount Avenue about 12:05 a.m. and, while en route, found the man wounded in the left arm and back in the 3400 block, police said. He was transported to an area hospital with non-life threatening injuries.

Detectives believe the man was closing his store for the night when he was approached by two men armed with a handgun who told him he was being robbed. The suspects went into the victim's pockets and stole his belongings before the victim ran southbound on Greenmount Avenue. Police said the suspects fired several shots as he ran, striking him twice.

Greenmount Avenue straddles Guilford and Waverly, east of Johns Hopkins University and Union Memorial Hospital and west of the old Memorial Stadium. The 3700 block is just north of the Oakenshawe community.

Police had promised a beefed up presence in the area earlier this month following a string of street robberies — some of joggers — in the neighborhoods surrounding Hopkins. Police had said they had first taken notice of the trend after a group of men stole a vehicle in Waverly on Aug. 2 and drove around North Baltimore, confronting at least four people and stealing cell phones from runners.

Police have made several arrests of juveniles and at least two adults suspected in many of those robberies including one man police suspect is responsible for a Roland Park shooting and attempted robbery that seriously wounded another man earlier this month.

Across the city, police have been dealing with a spike in shootings in the last two weeks.

July has seen more than 40 homicides so far, making it the second month in 2015 that homicides in Baltimore city have risen above 40. Homicides are also up across the board since 2014. See our homicide map here for a deeper dive into the data. Data accurate as of July 29, 2015 Months with more...

In 2015, Baltimore has seen two months with more than 40 homicides in a single-year period since the 1970s when the city's population was around 300,000 more residents, or during the 1990s when the number of homicides peaked at 353 murders.